diff --git a/activesupport/lib/active_support/execution_wrapper.rb b/activesupport/lib/active_support/execution_wrapper.rb
index f48c586cad..ca810db584 100644
--- a/activesupport/lib/active_support/execution_wrapper.rb
+++ b/activesupport/lib/active_support/execution_wrapper.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require "active_support/callbacks"
+require "concurrent/hash"
 
 module ActiveSupport
   class ExecutionWrapper